Magnetic-field-induced transition from metastable spin glass to possible antiferromagnetic–ferromagnetic phase separation in Cd0.5Cu0.5Cr2O4

Using ac susceptibility, dc magnetization and heat capacity measurements, we have investigated the magnetic properties of $Cd_0.5Cu_0.5Cr_2O_4$. $Cd_0.5Cu_0.5Cr_2O_4$ has an extraordinary magnetic phase including a metastable spin-glass(SG) phase at zero field, a possible phase separation scenario of AFM/FM above $\sim 0.5T$ field, and at intermediate fields, an apparent pseudo reentrant spin-glass (RSG) plateau is observed. These phenomena are closely correlated with the pinning effect of the $Cu²⁺$ sublattice on the frustrated lattice.